What is an electric wire?
Electrical wires are the conductors that carry electricity from the source to your home. They're either bare or insulated, and they're usually covered in a thin layer of PVC. If they have a PVC sheath, then the PVC is colored to indicate whether the wire is a neutral, ground, or hot wire in your electrical installation. We discuss wire colors in their own section in this guide.
Cables contain at least a neutral wire, ground wire, and hot wire that are twisted or bonded together. Depending on its purpose, the cable may contain more wires. The wires in a cable are insulated in their own color-coded layer of PVC. The group of wires is then encased in an outer sheath to make up the single cable.
How to Identify Wires and Cables？
When you're working with wires and cables, it's important to know how to identify them. Each jacket will have information printed on it to help you choose the correct product for your job. A letter code provides the attributes of the wire, along with material, gauge, and voltage rating.
For example, THHN is the most commonly used type of wire in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications. Below are the letters and attributes you'll see regularly in residential wiring:
T: Thermoplastic insulation
H: Heat resistance
HH: High heat resistance (up to 194 degrees Fahrenheit)
W: Suitable for wet locations
N: Nylon coating, resistant to damage by oil or gas
Electrical Wire Color Coding
Color coding is an industry standard for identifying a wire's purpose. It can be used to help the next electrician coming to a job site and advanced DIYers who plan to do some electrical work on their own.
Black: Hotwire for switches or outlets
Red: Hotwire for switch legs and connecting to hardwired smoke detectors
Blue and Yellow: Hot wires pulled through conduit; blue is often used for three- or four-way switch applications, and yellow is for switch legs to control fans, lights, etc.
White: Neutral (can be hot if marked with black or red to indicate it's no longer a neutral)
Green and Bare Copper: Only for grounding purposes
what is the red wire in electrical？
Have you ever wondered what the red wire in your home's electrical system is for? You're not alone. Here's the scoop on what red wires are, and how to use them safely.
Red wires are usually used as secondary hot wires. These wires carry a current when a device is switched on, but they do not carry a current when the device is switched off. This means that you can always tell whether or not there's power running through a red wire by testing it with a tester—if there's power flowing through the wire, it'll light up.
Red wires are also hot and should be marked to avoid the dangers of electrocution. Red wires are commonly used when installing ceiling fans, where the light switch may be hidden above or behind them.
If you're installing a new electrical circuit or upgrading an existing one, it's important to choose the right wire size. The proper wire size is critical to any electrical wire installation. Wire sizing indicates the diameter of the metal conductor of the wire and is based on the American Wire Gauge (AWG) system. The gauge of a wire relates to the wire's current-carrying capacity, or how much amperage the wire can safely handle. When choosing the right wire, you must consider the gauge of the wire, the wire capacity, and what the wire will be used for.
Wires that are not properly matched to the amperage of the circuits they serve can create a notable risk of short circuits and fire.
where to buy electrical wire？
Selling your electrical wire and copper wire surplus is a smart idea, and International Recovery wants to help you do it. Call us at (0086) 0755 8527 1922 for an easy and reliable solution.
Instead of letting old, broken, or out-of-date electrical wire and copper wire accumulate dust, we make it a simple process to sell your wire surplus and turn it into cash that you can then apply to other areas of your business.
The decision to sell electrical wire and copper wire surplus can be a big help if you’re looking for some extra cash, and International Recovery is always ready to pay cash on the spot before we even leave your site. By selling the old, broken, or out-of-date electrical wire and copper Wire you no longer need, you’ll have funds to use for new projects or internal initiatives at your company.